Adolf von Harnack and many later scholars believe a corruption of a story of Abgar IX corresponding with Pope Eleuterus was the origin of the legend of King Lucius of Britain, who supposedly introduced Christianity to his realm.
The Liber Pontificalis ascribes to Pope Eleutherius a decree that no kind of food should be despised by Christians (Et hoc iterum firmavit ut nulla esca a Christianis repudiaretur, maxime fidelibus, quod Deus creavit, quæ tamen rationalis et humana est).
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